Deep_discount_dvd_cd via Amazon offers the Man of Steel Collector's Edition Blu-ray 3D / Blu-ray / DVD Combo Pack for $9.84$9.52 plus $3.99 for shipping. Outside of other Amazon sellers and the price below, that's the lowest total price we could find by $26, although we saw it for $6 less two weeks ago. The combo pack includes the movie in Blu-ray 3D, Blu-ray, and DVD formats, a Digital HD UltraViolet copy, and a metal “S” glyph with acrylic glass stand.

Of note, with limited stock varying by ZIP code, Fry's Electronics offers it for $6.32 with in-store pickup.

Fry's Electronics offers Schoolhouse Rock!: Special 30th Anniversary Edition on DVD for $9.99. (Amazon offers it for the same with free shipping for Prime members.) Choose in-store pickup to avoid the $2.99 shipping fee. That's the lowest total price we could find by $3. This 2-disc set includes all 46 animated songs from the series as well as bonus content.

Update: The price at Fry's has now increased, but Amazon continues to offer it for $9.99 with free shipping for Prime members. Note that it's temporarily out of stock, but can still be ordered at this price for delivery when available.